ERROR 21 - Print Overrun

Error 21 occurs when the printer receives more data than it can handle at once, resulting in a "print overrun." This typically happens when the printer's buffer memory becomes full due to a large or complex print job.

How to Resolve It:

• Reduce Print Resolution: Lower the print resolution settings in the printer's driver settings or print dialog box. Printing at a lower resolution requires less memory and can help prevent print overrun errors.

• Simplify Print Jobs: Simplify complex print jobs by reducing the number of graphics, images, or fonts used. Avoid printing large documents or high-resolution images if possible, especially if the printer has limited memory capacity.

• Update Printer Driver: Ensure that you are using the latest printer driver compatible with your operating system. Visit the printer manufacturer's website to download and install any available driver updates. Newer drivers may include optimizations that improve memory management.

• Check Printer Settings: Review the printer settings to ensure that they are optimized for your print job. Disable unnecessary features or options that may consume additional memory, such as high-quality printing modes or advanced image processing.

• Add Memory (RAM) to the Printer: If your printer supports memory expansion, consider adding more RAM to increase the printer's memory capacity. Check the printer's specifications or user manual for information on compatible memory modules and installation instructions.

• Print in Smaller Batches: Instead of sending a large print job all at once, divide it into smaller batches and print them individually. This allows the printer to process each batch without overloading its memory buffer.

• Reset Printer: Turn off the printer, unplug it from the power source, and wait for a few minutes. Then, plug the printer back in and turn it on. This can reset the printer's internal components and clear any temporary print overrun errors.

• Contact Support: If Error 21 persists despite troubleshooting efforts, contact the printer manufacturer's support for further assistance. They can provide additional troubleshooting steps or recommend hardware upgrades if necessary.

By following these steps, you can effectively resolve Error 21 - Print Overrun and ensure smooth printing operations without interruptions caused by print buffer overflow issues.